Hi guys need some help. They other day when parking in my garage I shut the ignition off and the gauges flickered. Didn't think much of it at the time, it started fine the next morning and no symptoms other than auto drivers window didn't work. Reprogrammed it, drove all day with no issues then on the way home on the freeway doing about 75 and ac on the truck jerked like it wanted to die and all lights came on, but it didn't shut off. Pulled to the side of the road to inspect everything and truck remained running with no other issue. Drove home fine. Battery is new, does this sound like the alternator is flaking out? Battery was replaced under warranty, thinking alternator caused that to fail initially and am having same issue along with bad alternator. Any help would be appreciated. Thx!